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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/webui/welcome/ntp_background_fetcher.h"
#include <utility>
#include "base/memory/ref_counted_memory.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/net/system_network_context_manager.h"
#include "chrome/browser/search/background/ntp_backgrounds.h"
#include "net/base/load_flags.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "net/url_request/url_request.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "url/gurl.h"
namespace welcome {
NtpBackgroundFetcher::NtpBackgroundFetcher(
size_t index,
const content::WebUIDataSource::GotDataCallback& callback)
: index_(index), callback_(callback) {
DCHECK(callback_ && !callback_.is_null());
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("nux_ntp_background_preview", R"(
semantics {
sender: "Navi Onboarding NTP background module"
description:
"As part of the Navi Onboarding flow, the NTP background module "
"allows users to preview what a custom background for the "
"New Tab Page would look like. The list of available backgrounds "
"is manually whitelisted."
trigger:
"The user selects an image to preview."
data:
"User-selected image URL."
destination: GOOGLE_OWNED_SERVICE
}
policy {
cookies_allowed: NO
setting:
"This feature cannot be disabled by settings, but it is only "
"triggered by a user action."
policy_exception_justification: "Not implemented."
})");
auto backgrounds = GetNtpBackgrounds();
if (index_ >= backgrounds.size()) {
OnFetchCompleted(nullptr);
return;
}
GURL url = backgrounds[index_];
auto resource_request = std::make_unique<network::ResourceRequest>();
resource_request->url = url;
resource_request->credentials_mode = network::mojom::CredentialsMode::kOmit;
simple_loader_ = network::SimpleURLLoader::Create(std::move(resource_request),
traffic_annotation);
network::mojom::URLLoaderFactory* loader_factory =
g_browser_process->system_network_context_manager()
->GetURLLoaderFactory();
simple_loader_->DownloadToStringOfUnboundedSizeUntilCrashAndDie(
loader_factory, base::BindOnce(&NtpBackgroundFetcher::OnFetchCompleted,
base::Unretained(this)));
}
NtpBackgroundFetcher::~NtpBackgroundFetcher() = default;
void NtpBackgroundFetcher::OnFetchCompleted(
std::unique_ptr<std::string> response_body) {
if (response_body) {
callback_.Run(base::RefCountedString::TakeString(response_body.release()));
} else {
callback_.Run(base::MakeRefCounted<base::RefCountedBytes>());
}
}
} // namespace welcome
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